A new optical method for the determination of heat and gas fluxes measurement in the surface layer

被引：0

作者：

Tian, Yongzhi ^{[1
,2
]}

Liu, Jianguo ^{[1
]}

Zeng, Zongyong ^{[1
]}

Zhang, Yujun ^{[1
]}

Lu, Yihuai ^{[1
]}

Song, Xuemei ^{[1
,2
]}

机构：

[1] Key Laboratory of Environment Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei

[2] Graduate University of Chinese Academy of Sciences

来源：

Guangxue Xuebao/Acta Optica Sinica | 2012年 / 32卷 / 08期

关键词：

Atmospheric optics; Carbon dioxide flux; Flux-gradient method; Heat flux; Large-aperture scintilloneter; Open optical path; Tunable dioble laser absorption spectroscopy;

D O I：

10.3788/AOS201232.0801001

中图分类号：

学科分类号：

摘要：

Routine estimates of the turbulent fluxes of momentum, heat and trace gas flux have important significance in many meteorological, hydrological and other related studies. Combining with large-aperture scintillometer (LAS), temperature-gradient measurement system and tunable diode laser absorption spectroscopy (TDLAS), sensible heat flux and carbon dioxide (CO 2) flux can be derived by iterative over a long optical path. This method has realized fast detection of heat flux in large natural areas and CO 2 flux. The measured fluxes of sensible heat and carbon dioxide are compared with the results measured by a eddy-covariance (EC) instrument. The results show correlation coefficient of sensible heat flux is 0.91 and that of CO 2 flux is 0.74, respectively. Experimental results show that optical measurement overcomes those limitations of traditional method, so this method is an inspiring method in heat and gas flux monitoring.

引用